[Qemu-ppc] [PATCH v2 04/11] target/ppc: update ca32 in arithmetic add

[Nikunj A Dadhania]

Adds routine to compute ca32 - gen_op_arith_compute_ca32

For 64-bit mode use the compute ca32 routine. While for 32-bit mode, CA
and CA32 will have same value.

Signed-off-by: Nikunj A Dadhania <address@hidden>
---
 target/ppc/translate.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/target/ppc/translate.c b/target/ppc/translate.c
index c9f6768..b589d09 100644
--- a/target/ppc/translate.c
+++ b/target/ppc/translate.c
@@ -816,6 +816,23 @@ static inline void gen_op_arith_compute_ov(DisasContext 
*ctx, TCGv arg0,
     tcg_gen_or_tl(cpu_so, cpu_so, cpu_ov);
 }
 
+static inline void gen_op_arith_compute_ca32(DisasContext *ctx,
+                                             TCGv res, TCGv arg0, TCGv arg1,
+                                             int add_ca, int sub)
+{
+    TCGv t0;
+
+    if (!is_isa300(ctx)) {
+        return;
+    }
+
+    t0 = tcg_temp_new();
+    tcg_gen_xor_tl(t0, arg0, arg1);
+    tcg_gen_xor_tl(t0, t0, res);
+    tcg_gen_extract_tl(cpu_ca32, t0, 32, 1);
+    tcg_temp_free(t0);
+}
+
 /* Common add function */
 static inline void gen_op_arith_add(DisasContext *ctx, TCGv ret, TCGv arg1,
                                     TCGv arg2, bool add_ca, bool compute_ca,
@@ -842,6 +859,7 @@ static inline void gen_op_arith_add(DisasContext *ctx, TCGv 
ret, TCGv arg1,
             tcg_temp_free(t1);
             tcg_gen_shri_tl(cpu_ca, cpu_ca, 32);   /* extract bit 32 */
             tcg_gen_andi_tl(cpu_ca, cpu_ca, 1);
+            tcg_gen_mov_tl(cpu_ca32, cpu_ca);
         } else {
             TCGv zero = tcg_const_tl(0);
             if (add_ca) {
@@ -850,6 +868,7 @@ static inline void gen_op_arith_add(DisasContext *ctx, TCGv 
ret, TCGv arg1,
             } else {
                 tcg_gen_add2_tl(t0, cpu_ca, arg1, zero, arg2, zero);
             }
+            gen_op_arith_compute_ca32(ctx, t0, arg1, arg2, add_ca, 0);
             tcg_temp_free(zero);
         }
     } else {
-- 
2.7.4